Grate-bar.



No. 801,159. PATENTED 001., 3,1905. 11. s. RICHARDSON.

GRATE BAR.

APPLICATION FILED DEG. 30,1904.

DWIGHT S. RICHARDSON, OF NEW YORK, N. Y.

GRATEBAR..

Specification of Letters Patent.

Patented Oct. 3, 1905.

Application filed December 30, 1904. Serial No. 239.008.

To all whowt it Wtay concern:

Be it known that I, DWIGHT S. RICHARDSON, a citizen of the United States, residing in New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Grate-Bars; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the letters of reference marked thereon.

This invention relates more especially to that class of grate-bars which are adapted to be assembled in a group or series and to be operated'by connecting-gearing which imparts to all the members of the series a simultaneous oscillatory or rotary movement, although the specific invention here involved relates to the construction of each of the bars, and the advantages arising from the invention will be incident to the use of one or more bars and whether the same be operated independently or in connection with a series of bars. Gratebars of this class are made angular in crosssectionthat is to say, with a series of fuelsupporting faces and with end journals for supporting the bar arranged to take their bearing in a suitable frame or other supporting devices; and the objects of the present invention are to provide a stronger, more durable, and heavier bar than heretofore and at the same time secure the advantages of a structure which will discharge the ashes freely, will cut, crush, and discharge the clinkers, and not be liable to be burned out or injured if through carelessness the corner of the bar be left in position to project into the fire.

Referring to the accompanying drawings, Figure 1 is a perspective view of a grate-bar embodying the present improvements. Fig. 2 is a transverse section in the plane of one of the webs. Fig. 3 is a similar section in a plane between two of the webs. Fig. 4 is a plan view of the bar.

Similar letters of reference in the several figures indicate like parts.

The form of grate-bar adopted for illustration of the present invention is of the usual and preferred substantially triangular type or having three angularly-arranged fuel-supporting surfaces, although the invention is not limited to such type of bar.

The letter A indicates the journal and handle-socket extension at one end of the bar, and B the journal extension at the opposite end. The end A of the particular bar illustrated is adapted to hold a gear-wheel C, through which rotary or rocking motion is transmitted to other bars in the well-understood manne At the end of the part A an enlargement a is provided to form a socket for the crank or handle by which the bar or bars are operated.

In the preferred construction a hexagonal enlargement A is formed on the part A immediately inside of the journal A and the gear-wheel, having a similar opening, is passed over the enlargement a and onto the enlargement A, so as to rest flat against the face of a flange A extending out from the inner side of the part A. With this construction the parts may be cast, and when assembled the gear-wheel will be held in place between the flange A and inner face of the frame or bearing in which the bar is journaled.

In accordance with the present invention the fuel-supporting faces of the bar are formed by the convex edges D of a series of solid webs D, arranged transversely of the bar and connected together at each corner, as at E, leaving a series of openings in each face between the webs and extending through the bar for the ready admission of air and for the ready escape of ashes. The bar thus formed is solid in transverse planes between the openings, and the fuel-supporting faces are formed by the edges of the solid portions or webs and the connecting portions E.

Clinker cutting and crushing edges are formed by the longitudinal edges of the bar, and in order to form such cutting and crushing edges so as to be effective with the faces of the bar convex it is necessary that one of the surfaces which converge to form the edges shall be approximately radial. As shown in the drawings, the surface F is the approximately radial surface; but by the use of the term approximately radial I do not wish to limit the invention to a radial surface, as it may vary considerably from a true radial plane and may be purposely varied to form a more or less sharp cutting edge.

In the preferred construction and where it is desired to have a good body of metal at the corners, so as to prevent burning out if accidentally left projecting into the fire, the faces of the bar are not concentric with the axis, but are eccentric. Thus each face starts from the base of the cutting edge or surface F and curves outwardly to the top of the cutting edge at the next corner of the bar, and hence the cutting edge may be formed by the meeting edge of two surfaces, one being the approximately radial surface F and the other out the necessity of employing dry-sand cores or arbors.

Having thus described my invention, What I claim as new; and desire to secure by Letters Patent, is*

1. An integral grate-bar comprising a plurality of longitudinal cutting edges and a plurality of intermediate convex fuel-bearin g surfaces, said fuel-bearing surfaces consisting of a plurality of transverse Webs spaced from one another forming air-passages.

2. An integral grate-bar comprising a plurality of longitudinal cutting edges and a plurality of intermediate convex fucl-bearingsur faces, said fuel-cutting edges having two faces one formed by a continuation of the convex fuel-bearing surfaces and the other being substantially radial, and said fuel-bearing surfaces consisting of a plurality of transverse Webs spaced from one another forming airpassages.

3. An integral grate-bar comprising a plurality of longitudinal cutting edges and a pluralit y of intermediate convex fuel-bearing surfaces, said fuel-bearing surfaces being formed by the convex edges of a plurality of solid Webs extending transversely through the bar and spaced from one another forming air-passages.

t. An integral grate-bar comprising a plurality of continuous longitudinal cutting edges and a plurality of intermediate convex fuelbearing surfaces, said fuel-bearing surfaces consisting of a plurality of solid transverse Webs spaced from one another forming separate air-passages.

5. An integral grate-bar having three corners in cross-section, and comprising a continuous longitudinal cutting edge at each corner and convex fuel-bearing surfaces intermediate the corners consisting of a plurality of transverse Webs spaced from one another forming air-passages.

DWIGHT S. RICHARDSON. Witnesses:

D. BAIT RICHARDSON, ARTHUR NicriioLs. 

